Twyer.



w `Patented Dec. 4,v i900. J. E. WIELIS, L. BUYD J. HILL.

T W Y ER (Appxmtion mea .my 2, 1900.)

(N0 Model.)

W'lnesses ma Noam: mns gnomufum WASHINGTON, o. c.

JOHN E. WILLIS, LINCOLN BOYD, AND

PATENT OFFICE.

JACOB HILL, OF PUEBLO, COLORADO.

TWYER.

SPECIFICATION forming part of Letters Patent N o. 663,205, dated lecernbei` 4, 1900.

Application inea July'z, 1900.

To all whom it may concern:

Be it known that we, JOHN E. WILLIS, LIN- CoLN BOYD, and JACOB HILL, citizens of the United States, residing atPueblo,in the county of Pueblo and State of Colorado,have in vented a new and useful Twyer, of which the following is a specification.

This invention relates to twyers for blastfurnaces; and it has for one of its objects to provide an improved device of this character which is designed to'automatically shutoff all communication between the interior of the furnace and the twyer should the blast become discontinued or weakand for the purpose of retaining the gas within the furnace and preventing the same from escapinginto the blastpipe.

Another object resides in the provision of improved means for discharging the slag from the interior of the twyer should the slag rise above and into the twyer, and thus prevent the choking of the twyer and the blast-pipe.

It is furthermore designed to provide means for gaining access to the interior of the twyer without removing the latter from the wall of the furnace, so as to conveniently bore orcut out the slag should it overflow into the twyer and become hardened and clogged therein.

With these andother objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accompan ying drawings,and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size,and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure l is a side elevation of a twyer constructed in accordance with the present invention. Fig. 2 is a similar view, parts being broken away to show the means for closing the blast-pipe and the discharge-nozzle. Fig. 3 is a top plan view of the twyer. Fig. 4 is a transverse sectional view taken on the line et 4 of Fig. 2.

Corresponding parts are designated by like characters of reference in all of the figures of the drawings.

Referring to the drawings, it will be seen that the present form of twyer comprises a semina. 22,347. et man.)

`substantially rectangular body 1 in the forln of a casing, which is extended vertically, so as to accommodate the cut-off valves, as will be hereinafter explained. The lower side of the body is provided with a downwardly-tapered extension 2 to form an overflow-chamber, which has a discharge-opening 3, that is normally closed by means of a suitable closure-plug 4.

The front and rear walls 5 and 6 are substanti-ally perpendicular and parallel and are provided with the corresponding inlet and outlet openings 7 and 8, which are in communication with the blast-pipe 9 and the discharge-nozzle l0, respectively. Theouter end of the nozzle is designed to be inserted through the wall of a furnace in the usual manner and is tapered, so as to confine the blast and increase the force thereof. The inner end of the nozzle extends a suitable distance into `the interior of the body or casing, as at 11, so as to form a valve-seat for the valve 12, which is designed to ,close the inner end of the nozzle. The inner end of the blast-pipe 9 also extends into the interior of the body or casing, so as to form a seat for the valve 13. As

best shown in Fig. 4, each valve comprises a' metal plate or disk having the opposite bearing-ears 14, which project above the upper edge of the plate and are hingedly connected to a corresponding pair of ears or lugs 15, formed upon the inner side of the casing by means of a transverse pivot pin or rod 16, so that the valve may be swung upwardly into the upper extension of the casing. A suitable stop-shoulder 17 is provided upon theinner side of the top wall of the casing and in the path of the movement of the valve l2, so as to limit the movement of both valves, the latterbeing connected for simultaneous movement.

In order that the two valves may operate simultaneouslytoopen and close the inlet and outlet openings, the intermeshed segmental \gears 18 and 19 are iixedly connected to the outer ends of the pivot-rods of the respective valves, such rods projecting outwardly through the case, so as to locate the gears upon the outer side of the twyer. It will now be apparent that the valves open upwardly and inwardly in opposite directions, the inlet-valve 13 being actuated by the force of the blast,

IOO

which holds said valve normally open, 'and the outlet-valve is also held normally open by means of the connection between the two valves. will simultaneously drop by gravity to automati'cally close the inlet and outlet openings. To insure a prompt and effectual closing of the valves, a weighted leyer or pendulum 2O is located opposite the gears and is connected to one of the pivot-rods of the valves-as, for instance, to the projecting end of the rod for the inlet-valve. actuating means and the intermediate connections for simultaneously operating the valve are located upon the outer side of the casing, so as to be in convenient position for repairs. To permit of the application of the valves, one side, as 2l, (indicated inY Figs. 3

and 4,) is made separate from the casing and secured thereto in any suitable manner;

The blast-pi pe is of substantially Y shape,

one branch 22 forming the blast-pipe proper for connection with a suitable source lof supp ply and also preferably inclined upwardly from the body of the twyer, while the opposite branch 23 extends in a straight horizontal line from the twyer, so as to give access to the interior thereof for the entire width of the inlet port or opening. The outer end of this cleanin gpipe is normally closed by means of a suitable screw-threaded cap or cover 24, which is provided with radial arm-s 25 to facilitate the application and removal Aof the cover and also having a central wrench-head 26. pipe is provided with an outer annular flange 27, which is connected to the body of the twyer by means of suitable bolts 28.

In order that the inlet-valve may have a projecting seat to close against, a short'section of pipe 229 is fitted in the inlet-opening,

and each valve is provided with an asbestospacked face 30 to close against the respective inwardly-projecting valve-seats, so as Vto insure a tight t of the valves and prevent injury thereto by the heat and fiames which may enter the twyer. v l

From the foregoing description it will be apparent that when the blast is in operation the two valves will be held open by the force of the blast, and thus maintaining an unobstructed passage for the blast through the twyer and into the furnace. Should the blast be cut off or become weakened andnot sufliciently strong to prevent the outward escape of the gas from the interior of the furnace, the weighted pendulum will rock the rod 16, and thereby automatically close the outlet and inlet openings, so as to preventan outward escape of the gas from the furnace. Should the slag within the furnace rise above the normal level and flow into the interior of the twyer, it will run down into the .overflowchamber and blow out the plug 4, and thus conveniently overflow out of the lchamber without damage to the valves. However,

Should the blast be cut off, th'e'valves"v By this arrangement the The forward end of the Y-sha'ped blast-' should this overflow be prevented for any rea-- son and the slag should become clogged within the interior of the casing, so as to prevent the operati-on of the valves, said slag may be removed through the open end of the cleaningpipe 2-8,.which is normally closed by the cover 24, so as to prevent the escape of the blast before it enters the furnace.

1. Atwyer, comprising a casing, having an inlet blast-pipe,a discharge-nozzle,and means for closing the blast-pipeand the nozzle constructed and arranged to operate by the cutting 0E or weakening of the fblast.v

2. A twyerhhavingan ,inlet blast-pipe, a discharge-nozzle, a valve for the nozzle, and a movable valve-controlling device mounted in the path of the blast from the blast-pipe and operated thereby to open and close the valve.

3. A vtwyer, comprising a casing., an inlet blast-pipe, a discharge-nozzle, an inwardlyswinging valve for the discharge-nozzle, an ,inwardly-swinging valve-controlling device located within the path ofthe blast, and an operative lconnection between the Valve and the controlling device.

4. A twyer, comprising a cas-ing,- an inlet blast-pipe, a discharge-nozzle, 'avalve located within the casing and arranged to close the noz'zle,',a yieldable valve-controlling device located within the casing and also in the path of the blast, and intermeshing gears operatively connecting the valve and the controlling device.

5. A twye'r, comprising a casing, an inlet blast-pipe, a discharge-nozzle, a valve for controlling the nozzle, and means for normally holding the valve open by the force of the blast. 6. A'twy'er, comprising a casing, 'an inlet blast'-pipe, a discharge-nozzle located opposite the blast-pipe, a normally op'e'n valve for the nozzle, a swinging valve-controlling device mounted within the r.casing and in the path of the blast, intermeshing gears'connect- Ving lthe valve and the controlling device, and

a weight connected to the latter for throwing thevalve-controlling device after the blast is 'cut off or weakened.

7. Artwlyer, comprising acas'ing, an inlet blast-pipe, a discharge-nozzle, opposite rockshafts mounted within the casing, la nozzlecontrolling valve carried by one of the rockshafts, a valve-controlling device carried by fthe other shaft and located in the path of the blast, intermeshing gears carried by the shafts, and a weighted pendulum or arm carried by one of the rock-shafts.

8. In a twyer, a casing having 'oppositelyalinedinlet and outlet openings, a [substan- -tially Y-'sha'ped blast-pipe fitted to the inletopening, one branchof the pipe being extended 'straight out 'from the opening and yforming a cleaning-pipe, a removable cover for the outer open end thereof, a discharge- IOO IIO

nozzle for the ontletopening, the bottom of the casing being extended downwardly into an overflow-chem ber communicating with the interior of the casing, a normally open Valve for the nozzle, a valve-controlling device located in the path of the blast, and an opera.- tive connection between the valve and the controlling device.

In testimony that we claim the foregoing as our own we have hereto aiixed our signatures :o in the presence of two Witnesses.

JOHN E. WILLIS. LINCOLN BOYD. JACOB HILL.

Witnesses:

FRED MAURER, C. E. NICHOLAS. 

